Electric-lamp body, reflector, and shade-holder



H. D. CAHILL.

ELECTRIC LAMP BODY, REFLECTOR,AND SHADE HOLDER.

APPUCATION FILED JAN. 26, I920.

' 1,353,5 2, PatentedSept.21,1920.

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'sTAE HENRY D. CAHILL, OF BOSTON, MASSACHUSETTS.

ELECTRIC-LAMP BODY, REFLECTOR, ANDSHA DE-HOLDER.

essence.

Specification ofLetters Patent. Patent-ed sepaan eeo.

Application filed January 26, 1920. Serial No. 354,171.

1 ing may be obtained. Another object of the invention is to produce a convenient and in-" expensive shade holder for use in connection with an indirect reflector and electric light. Another feature of the invention relates to the means whereby the reflector and reflector supporting plate and lamp body may be conveniently locked together and readily separated when desired.

The invention will be fully understood from the following description when taken in connection with the accompanying drawings, and the novel features thereof will be pointed out and clearly defined in the claims at the close of this specification.

In the drawings, Figure 1 is a View in elevation partly in section showing the combined lamp body, reflector and reflector supporting plate, embodying the invention, locked together. i r r Fig. 2 is a section on line 2-2 of Fig. 1.

Fig.3 is a plan-view of the lamp body without the lamp and reflector and reflector supporting plate. i

Fig. 4 is a sectional view of the reflector holder plate. v

Fig. 5 is a view in elevation of the wire cage which serves as a'locking member for the reflector holding plate and lamp body.

Referring now to the drawings, 1 represent the lamp body which is shown without the ordinary supporting base, thebody being adapted to be attached to a suitable base of any design. Said body is made hollow, the lower rim portion 2 being preferably internally screw-threaded, so' that it may be screwed on to the standard of any suitable base, preferably at: a table lamp.

It may, however, be attached in any suitable way, the attaching means notbeing shown asit forms no part of the present in: vention.

The upper partof the body flares outwardly to, form a seat for the reflector supporting plate shown in Fig; 4:. The reflector supportingplate consists of 'a saucershaped plate 8 with a central aperture and having an outwardly flaring periphery 9.

which is adapted to be seated upon the flaring upper end 10 of. thelamp body 1, as shown in Fig. 1. It has an upwardly eX-r tending tubular portion 3 which extends upward-from'the periphery of the central aperture and is screwthreaded on itsouter periphery .for connection with the threaded annular base 6 of the reflector. The said threaded portion 3v of 'thesupporting plate is made tubular to allow the passage of the base 4 of an electric light bulb 5 down through the aperture in the plate 8 into the threaded lamp socket29 which is connected.

with the lamp body 1.

The upper rim portion-11 of the lamp body is internally grooved. for the purpose to be hereinafter described.

.The flaring portion 10 of thelamp body preferably has a curved seat portion, as

shown, .on which rests. the correspondingly curved portion 9 of the saucer-shaped base 8 of the reflector supporting plate.

The reflector .7 previously referred to flares upwardly preferably with an ogee curve. The reflector is made with a suitablev reflecting surface 12. on the inner face. Preferably this reflector is made of metal witha dull white finish, but the exact materialo'f which the reflector is made is not essential, nor is the particular form of finish. The lower end of the reflector is formed with an annular base portion 6 which is internally screw-threaded to fit the exterior screw threads of the supporting plate 3.

I provide a suitable means to lock the supporting plate 8 in'position on its seat in the lamp'body. This is shown as a frame of skeleton form, made of wire and is ofthe general contourof the reflector butis of 'a little larger diameter so as. to surround the reflector and serve also as a shade holder. It comprises a plurality of upright rib portions 17 preferably four in number arranged 90 apart from each other and preferably bent to the general shape shown in Figs. 1 and 5. Each rib 17 is bent at its lower end to form a loop 18 which as shown bulges outward slightly serving as a looking lug as will be hereinafter described. A ring 19 is engaged in the eyes of the said several loop portions 18 and fastened thereto, preferably by welding, and forms a spacing member for the lower end of the wire frame and shade holder.

ilreferably in order to still further stiffen the wire frame and brace the ribs 17 there is provided a wire ring 20 which is welded to the ribs 17.

The upperedge or rim of the body 1 is formed with four notches 27 corresponding in number to the lugs 18 on the ribs 17 and arranged 90 apart, so that the wire frame may be assembled with the lamp body 1 and reflector supporting plateby first positioning the reflector plate on its seat in the lamp body and then setting the wire holder down on top of the reflector supporting plate in such position that said projecting loop or portions or lugs 18 are in alinement with the several notches 27, and allowing the said lugs 18 to become seated upon the upper face of the flaring portion 9 of the base 8 of the reflector supporting plate. This will bring the said lugs down through the notches into the groove of the curved portion 11 of the body member. Now by giving a partial ronal locking lugs 18'.

tation to the wire frameso as to bring the said lugs 18 out of alinement with the notches 27 it will move the said lugs 18 along in the groove formed by said curved portion 11 of the body, and by leaving the wire frame in this position with the lugs intermediate between the notches 27, the wire frame will be locked in position so that it cannot be lifted off of its seat except by rotating it far enough to bring the'lugs again into alinement with the several notches. The wire frame thus being locked in position also looks the reflector supporting plate to the lamp body and in this way all the parts are locked together.

Preferably the wire ribs 17 are bent outward, as shown at 28, just above the termi- This double bend is in part for the purpose of giving greater stiffness to the rib, and also to allow the wire to be bent for the purpose of adjustin grit in height.

he upper part of the wire frame is intended to serve as a shade holder, thus utilizing the wire skeleton both as a shade holder and a locking member for the reflector supporting plate. It is obvious, however, that so far as the locking feature is concerned, the upper portion could be omitted and the wire ribs shortened. It is also obvious that it is not necessarily made of wire, but an annular member with peripheral lugs of any suitable forum may be employed and still embody the invention.

In order to adapt the wire frame as a shade holder, the wire ribs 17 are extender'l to form arms23 terminating in hooks 2-11; to serve as supports for the ring of a shade.

l l hat I claim is:

1. A lamp body having in combination therewith an inverted reflector member, a reflector supporting plate seated on the lamp body and means for locking the reflector supporting plate to the lamp body. said locking means being operable to locl; and unlock at will the supporting plate.

2. A lamp body having a cup-shaped upper end, a reflector supporting plate seated in said body and having an upwardly extending central portion formed with a screw-threaded periphery, and an inverted reflector formed with a base having a screwthreaded portion which is adapted to be screwed onto the threaded portion of said supporting plate, and means for locking the supporting plate to the lamp body.

An electric lamp body having a cu shaped upper end, a reflector supporting plate having an apertured base seated in said body, and having an upwardly extending central portion formed with a screwthreaded periphery, an inverted reflector formed with an annular base having a scre thread which is adapted to he screwer onto the threaded portion of said supporting plate, in combination with a locking member having upright rib portions, the lower ends of said rib members having outwardly extending lug portions, the up er rim of the lamp body being formed with notches corresponding to the lugs of the locking member and being formed with an internal annular groove, said notches being so located to form guideways for the lug portions of the ribs, whereby the sail lug portions may be admitted through the said notches in the said groove, and whereby by partial turning of the locking member after the lugs are admitted into the groove, the reflector supporting plate and lamp body are locked together.

l. A lamp body, having a cup-shaped upper end formed with ail-internal annuh groove,,the rim being former with a plu rality of notches extending downwardly to meet said am ular groove, a reflector supporting plate having base seated in said body, and a locking member having a base seated upon the said reflector supporting plate, and having a plurality of lugs which are adapted to be engaged with said notches in the rim of the lamp body to admit the lugs into the annular groove, said locking member rotatable on. its axis when the lugs are inserted in the groove to bring the lugs into locking engagement with the lamp body, Y e 1 5. A lamp body having a cup-shaped upper end formed with an internal annular groove, a reflector supporting plate seated in said cup-shaped portion of said body, and having an upwardly extending tubular portion formed with a screw threaded periphery, an upwardly flaring reflector, formed with an annular base having a screw thread by which it is screwed onto said threaded portion of the supporting plate, and means for locking said socket member to'its seat in said lamp body, said lamp body being provided with a socket for an electric light'bulb, said reflector supporting plate being formed with a central aperturein alinement with said upwardly extending tubular portion into which the said socket member extends when the supporting plate is on its seat in the lamp body. l

6. An electric lamp body having a flaring upper end formed with an internal annular groove, the rim being formed with a plurality of notches extending downwardly to meet said annular groove, a shade holder formed to support a shade at its upper end having its lower end formed with a plurality of lugs arranged in'series in a circle which are adapted to be simultaneously engaged with the said notches and to guide the lugs in to said annular groove, the said shade holder being rotatable on its axis when the lugs are inserted in the groove to bring the lugs into the annular groove and thereby lock the shade holder in combination with the lamp body.

7. A shade holder for an electric lamp consisting of a, skeleton cage comprising a plurality of upwardly extending rib members which flare outwardly from the bottom towardthe top, binding rings uniting the said ribs at the top and at the bottom, the bottom ends of the ribs being bent to form loops through which the lower wire ring passes, and which serve as locking lugs, in combination with a lamp body having a cup-shaped upper end formed with an internal annular groove, the rim of said lamp body being formed with a plurality of notches which extend down into said annular groove and correspond in number and spacing from each other to the number and spacing of the ribs of the shade holder, the diameter of the lower end of the shade holder being of such relation to the diameter of the rim of the lamp body that the lugs on the lower ends of the ribs may be brought into alinement with the said notches to admit the lugs down into the annular groove and permit the partial rotation of the shade holder to bring the lugs into the annular groove and thereby lock the shade holder into combination with the lamp body.

8. An electric lamp body having a cupshaped upper end formed with an internal annular groove, a'refiector supporting plate having an annular base seated in said cupshaped portion of said" body, and having an upwardly extending tubular portion, an upwardly flaring reflector formed with an annular base, means for securingtogeth'er said reflector and reflector supporting plate, the lamp body being provided with a lamp socket into which the base of an electric light bulb may be screwed after inserting the base of the bulb down'through, the reflector supporting plate, the upper rim of said lam body beingformed with a plu-' rality o notches which extend from the upper edge of the rim down into said an nular groove, and a lamp shade holder having an annular lower end of a diameter. which isadapted to fit within the groove of said lamp body and having a plurality of peripheral lugs which project outward far enough 'to'prevent the said holder frombeing inserted through the mouth of thelamp'body into the groove except when the lugs area'lined with the notches, said lugs being spaced apart to correspond with the spacing between said notches so that by positioning the shade holder so as to bring said lugs into alinement with said notches, the said lugs may be passed through the notches and the shade holder may be seated within the lamp body and by then turning the shade holder on its axis the lugs may be brought into the groove out of alinement with the notches and lock the shade holder in connection with the said lamp'body.

9. An electric lamp body having a cupshaped upper end formed with an internal annular groove, a pluralityof notches extending from the upper edge of said lamp body down into said annular groove, a lamp shade holder having a base of a diameter adapted to fit into said annular groove and having a plurality of lugs projecting from the periphery thereof which prevent the shade holder from being inserted into the .open end of the lamp body to engage with said annular groove except when the lugs are alined with the notches, said lugs being spaced apart from each other to correspond with the spacing between the notches so that when the lugs are brought into alinement with said notches the shade holder may be seated within said annular groove and then rotated to lock the shade holder within said annular groove, and means whereby a shade may be supported by said shade holder.

10. An electric lamp body having a cupshaped upper end formed with an internal annular groove, a plurality of notches extending from the upper edge of said lamp bod down into said annular groove a lamp she e holder which has a base of a diameter adapted to fit into said annular groove and having a plurality of Lugs projecting, from the periphery thereof-which prevent the shade holder from being inserted into the i open end! of the lamp body to engage with said annular groove except when the lugs are ali-ned with the notches, said lugsbeing spaced apart from each other tocorrespond with the spacing between the notches so that when the" lugsare brought into al'inement with said notches the shade holder may be seated within said annular groove and then rotated to lock the shade holder within said annular groove, and means whereby a shade may be supported by? said shade holder, said lamp shade holder being formed as a skeleton cage having a'plurality oi: upright rib portions, a bottom ring portion formed with lugs to engage said notches as described, and a binding ring which unites the upper ends of said rib portions, the upper end of said ribs also having arms provided with: hooks to hold the ring of a lamp shade.

11. A lamp body having in combination therewith a reflector supporting plate" mounted thereon, a reflector mounted on said supporting; plate and a locking member mounted also on said supporting plate, said locking member and said lamp body being formed with portions which are adapted to be interengagedl with each other, whereby the said locking member and lamp body may be locked together and unlocked at the will of the operator.

12. A lamp body having in combination therewith a reflector supporting plate mounted thereon, a reflector mounted on said supporting plate and a locking member mounted also on said supporting plate, said locking member and said lamp body being formed with portions which are adapted to be interengaged with each other,

whereby the said locking member and lamp body may be locked together and unlocked at the will of the operator, said locking member being formed with shade supporting portions which extend upward and outside or the reflector.

In testimony whereof I atfix my signature.

HENRY D. CAHILL. 

